Calculator.



l. G. VINCENT N. WHITE.

CALCULATOR.

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CALCULATOR. APfuc/Tlon min stPLzl. |909.

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. CALCULATOR.

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CALCULATOR.

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Patented Apr. l0, 1917.

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' CALCULATOR. APPLICATION IILED SULB. Il".

Patented Apg. 0, 1917 Il SHEETS-SHEET l5.

I. G. VINCENT & N. WHITE.

.CALCUL'ATOIL APPLICATION FILED SEPT. |909.'

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f/-f-N 'tion without affecting therccording 'mecha .the product rom the multp ying aceumiir UNITED STATES PATENT OFFICE.

JESSE G. VINCENT AND NELSON WHITE, 0F DETROIT, MICHIGAN, ASSIGNORS TO BUR- ROUGHS ADDING MACHINE COMPANY, OF DETROIT, MICHIGAN, A CORPORATION 0F MICHIGAN.

CALCULATOR.

ntented Apr'. 10, 1917.

Application led September 24, 1909. Serial No. $19,459.

To all whom it may concern.'

Be it kuownthat we, Jnssi: G. VINCENT and Niziox Wiirri., citizens of the United lS'tates,residing at Detroit, county of Wayne, and State of Michigan, have invented certain new and useful Improvements in ('aleulators, of which the following is a specificution.

The present invention relates primarily to the matter of equipping an accounting inacliine with means for performing direct multiplieati'on b v a single operation of the inachineI for each digit of a multiplier. Thus, liaviiig set up on the keyboard the multiplicnnd and n digit of the multiplier, a single pull of the operating handle will result in' registering the product which in the ease of a multiplier of a single digit will be the com-` plete product, but in the case of a multiplier of morev than one digit willvbe a .partial product. In the latter case the multiplicand will be again set u'i on the keyboardone decimal place to the eft and withkthc next digit of the multiplier set up a single.' pull of the operating handle will add to the l partial product another partial product and' f so on until the complete; produc'stjis'regia-f` tered. Asi-to 4recording,-provision is niadegf for first recordingthe ,miiltiplicandwith?? out affecting the accumulatingmechanisiiil andl then recording. theA -niultiplierwalsof without affecting, theA accumulating` mecha-* nism`, and; then performing the iniiltil'iliea nisrn and finally lrecording tlieprodiietvhil preservin the registration of, the same" IfoI addition t ereto ofamountso'r further prod acts. .In the'iatt'er-connectiorifa` separate accumulating mechanism is employed 'which f can be used as the accumulatingmeehanisnij Y. yoflan ordinary adding xn'acliinejto 'accumii late' amountsl butl accordin tothe present".v invention nia alsobe emp o ed: tol receive' lator. In connection withthe recording inecliansmprovision is also made for. ispe-v cial characterizing-of"different imprints to distinguish a them' 4las added amounts, multi-1y plieands or multipliers liste l;witlioiit being"l regllsteredwnd totals and 'subtotalsfl` l he present". invention is in the nature ofr an .improvement upon tliejsole invention-lof Jesse GrVinceiit, which is theI subject of lan application tiled Fcbriiary`l8, 1911,Scrial. i

No. 607,282, and ,the present joint invention relates to control devices applicable to the machine of said sole invention, such control devices having to do with variously conditioning the mechanism for performing different sorts of mathematical work. In the construction'liere shown these control dev ices take4 the form of depressible keys and coperatiiig connections` through manipulation of which the machine may be caused to perform. the simple work of addition,0r 65 may be causedto print without adding, or may be caused to carry on multiplication in such manner ashereinbeforc -outliiicd without printing and without line-spacing of the piiperon which tlie'record of work is inade,oi' 70 the machine niay be caused to print the complete product wth'or without I ireserving a registration of that rodu'ct,or may be ca used to successively trans er products from one set of wheels or p'nioiis to another upon which 76 such products will he added together, or the machine nia f be caused to print anaccuniulation.` of 'a' dedanionnts orof 'transferred productsor ofl-lhoth, eitherk leaviugtlie maf` Achine in'a clear?? condition or reregistering 80 j the accumulation tobe further added toa A fmore"clearlygfli`ig. 2 lis ai Nertieal transijerse 85 A mKftioiiLtnk'eii Iapproxiiiiatelyftlirougli f the I'eeuteiifgtheliiialiiueif-Fig. 3 is a left-hand Fgyirispa section o -Mtiikenonff'lneQ-Q of Fig. '8 looking-in the 10o l direction? of. arrowlcrossing'snid. line` with parts "at-normal;l "Fig.- 10 is a'view similar tojFig.a1.9 but with tlie transfer tripped and e -.thezrakfliartraveling in the direction of the arrow th. tical seetion'ofI the rear accumulator'and its e'reon'frFig. 11 is a longitudinal vci- 105 traiisf'erfmechanisms taken 'on the line 11T-11 of Fig.j-12; l"ig. 12 is a rear view of is a sample of Fig. 11; Fig. 13is a detail view ol' the transfer mechanism of the upper (units) racks in tri iped position. the racks being shown inoveil forward from uoruial position; Fig. 14 is a top plan view of tlie transfer inecliaiiisin of the upper (units) racks in iioiinal position as shown in Fig. 1l; Fig. 15 is a detail view of the transfer mechanism of the lowcr (tens) racks in tripped position. the` racks being;` shown moved forward from normal position; Fig. 16 is a top plan riew (taken on the liiie. lli-lli of Fig. 11) of the transfer mechanism of the lower (tens) racks` iii normal iosition -asi shownin F ig.

- '11; Fig. 17 is a etail 'view of part of the multiplier bank and part of an amount bank, with a key depressed iii each, also the stepped segment. for tlie depressed amount key. in operated position eontrollinff the .po

sitioning of the aetuatiii racks; ig.- 18 is a lef t side elevation of t ie front ortion of the machine, showing etl'ect of epressin the total key; Fig. 19 is a view' like Fig. 18..

is a view like Fig. 18` showing the" listing key depressed; Fig. 21 is a view like Fig.`18 showing.;` the multiplication key depressed; Fig. 22 is a view like Fi. 18, showing the product key delpreased; `ig. 23 yisi a detai view of the grat uated atop plate of thesevea. (amount) kev; Fig. 24 is a sample of the work in single column formation, using the automatic line-spacing mechanism; Fi '25 the work in triple coumn formation with 'the automatic line-spacing'. mechanism tlirwnout'.

General (Ice eiji/ivton.' I

' The principal sectionsof themaehiue ane-@ as follows: he keyboard which controls: the positioning ofA the graduated stop plates -g and tlie movements of the accuinulatora: the

rear accumulator uponwhich .'tlie dtl'eieat operations of multiplicntii'm anfiieeumu-"ff lated: thefront accumulatorfupouwhielrI addition is performedaud to'whieli the'inuh' tiplicatioa prtxluetiraretraiafernd trouv-ii: the rein; accumulator; the .printer aeetioiiforgprinting amount,v fiaaltip'lieaada; multi-P products, liiuhtotala fand 'tot alaand' pliers. special characters" diiitiiijri'iialiii'iefrfv ltlu prima; and the drivingiaeeliaaisu' In the preent maeliin'er';'tht-refare une haaks of amount' keys'andoiiifliau'k kif-'tapiir tiplierkeys, aaidfinultiplie kevii'laiinizItho-- ciated hunk is depressed. This iiiit-ial stop plate, iu its normal position; blocks the ien (lower) rack and forms a stop tor the nuit.` (up ier) ruck. thus limiting the movement of t ie. type carrier so as to Iset. the '/.cro type for printing. 'llie multiplier keys leu-riuiue the distance the released` graduated `stop plates will he allowed to drop.

'lhc following scipienee of operations is followed iii performing an example in nmlg .belowthe multiplicand thus:

l 683 '1:0 proceed we now lpress the multiplica-v tion (M) key which serves to hloek the printing hammers and toi'disahle the automatie e-spalcing meehanismof the eari ringe. .-.Tlie'multiplieand 5,483 is then again set upon. the'.tirstfour,banks1 otv amount. .9a keys? This releasesA the stopplates in eaeh bank lcorresponding.; to the.' keys. depressed; The,l first digt (3) of the multiplier is now set up .on,the multiplier hankf- -'lhia`det er f mince-how furtherelcasedstop plates will' droplivlicmtlie Vu n'i'rliiiielisloperii'ted. llie x luuieliineis nowv operated andthe. product of MStt'multiplieddlmdi is accunuilated on. the rearjaceuiiiiiliitoi' o'l\.t the, end` of tliil-: 'ope.r-

key.) .r la ro 'ieleuaed. '.Tlie; next stepl is' t oujthe amount k'o v.-. :lmt t his time it is moved.

ou'I them u i 1t?.eliinilirltlih M .tov' nitiltiplie'al'iou l key.-

n s" i y i ,v the 'accumulatore that 'jippii operation o f the machine the product of multiplication as acciuniilated on the rear accumulator will be transferred to the 'front accumulator.

In plain addition the amounts are added directly on the front accumulator as will be hereinafter ex lained. Of course addition can also be one on the rear accumulators by using` the one (1) multiplier key, in which ease the operation will be precisely as in multiplication.

Keyboard, (Figs. '1, 2, 4, 6 and 17.)

Referring to Fig. 2 the keys Ax slide through slots in the keyboard plate and through slots in a series of angle brackets below said keyboard plate." The keys are normally upheld, by s )rings surrounding the stems between the lirackets and suitable shoulders on the keys. Each key is provided 'at its lower'end wit-h a "pin which engages just back of the obliquely slotted portion.-

By this arrangement one cross rod A1 serves to support two releasing levers of each bank. F or instance, the releasing lever of the sevenV (T) 'key is supported at its forward end by` reason of the engagement of lits forward ex-E tension A over the-cross-rod A' which exetends under the rearward extension A of the next lower releasing llever,`.thereby lalso j supportingsaid lever. l.

The releasing levers A- are lieldfro|n latof the. angle brackets guiding 'the keystems,

in the slot of the bracket immediately above it and the rearwardextensinA. engagii'igy in the slotl of the nextfhligher bracket.

Itfwill be .obvious that thodepression'of anyaniourit keywill cause rearward movenieiit of its releasing bar'A byreason offtlie cam action between the pin in the key stein ward movement `of the releasin stood that tliereare nine of these raduated stop plates A* foreach amount ank (see Fig. 6): These plutes'are -mounted lo/oselyx Figs'. l 4 and [itl will each'lever being guided by twoofjtho angle brackets, the forward extension A? engaging y upon a cross-rod A* which extends between the two keyboard frames A. Said plates aie spaced on the cross rod As by circular disks or washers A which also serve to hold from displacement the forward ends of v Springs A". Said springs are bent around two cross rods and are separated thereon by small, disks or washeis. The forward ends of the springs rest on the upper edge of the plates A and tend to force said plates downward. The twor cross-rods supportini..r the said sprin s are suppoited at their left-aand ends 1n tie left-hand kcjfioard fraiiic and on their right-liand ends in a bracket An which.is secured to the cross-rod which is mounted rigidly in the keyboard frames A (see Fig.'4). -This is done so as to avoid interference with ineehanisni of the multiplier bank.`

The release stop plates A* are upheld, until the machine is operated. by a restoring -bail .Vf-which is operated by mechanism to 'be hereinafterdescribed.

l It is not only necessary that the depression of un amount key shall release its associated stop plate; but-by the same act Vthe initial stop plato A must of course be`withdrawn from the patliof the actuating racks.

These initial stop plates are similar in fornito the amount stop plates and are more -clearlyshown'in dotted lines in Fig. 1T.

- "llie'lateliing pawls A of the initial stop plates are pivoted on a cross-iod "Ab" and iave .pin-and-slot-connections with locking detente A1. actuated by pins on the key stems ycoacting,witlroblique 'slots ini'said detents. Asfwill be seen by referring Vto Fig. 17,' the l depression of a key all oftheremaning locked. Fig.l 17

in any bank f will c aiise keys in said bank to be l amountbankdepressed thereby .releasing its v the keysA# en igingiii lan obliqiie slots in a series ofiftlf. iars'.'A"-,\'vli`ich extend rearwardlyandam gnjdedpn studs A secured rto the keyboard franje A.

' graduated sto plate andA also the initial eral displacementattlieii forward ends byw` engagement in slots' in the vertical portions 1104 l -Said stop hars "A"I are provided with "laterally extending ears A"`which`.are adapted.-\vhen the keys are depressed, tobe-moved into thepath of a. stud Ani-"secured tothe 'top' off'ir vertical link A andguided in itsvertical reciproca-` frame Aasad link is connected to aniupvturned' endz'ofltlie right y"aide farm of the restoring hail A: 1Aspring'A'iioriiiiilly and multiplier (as set up on the multiplierbank). y o Graduation.: of .stop plates, (Figs. 17 and 1 23 By reference to Fig. 25 (which illustrates the graduated stop plate of one of the 7. keys) the. arrangement of the graduations will be clearly understood. .Thisplate is eut according to the multiplication table of seven, the multiplier determining the number of spacesisald plate is allowed to drop. 'l'hus when nine is the multiplier, said plate will be permitted to drop two spaces; when eight is the multifplier four spaces, etc. The upper spaces, o these sets of two spaces each, are eut a suflicient number of spaces in a radial direction to. determine the number of units in the product of seven multiplied by a. certain multiplier. The lower space of each setof two spaces is cut a sufficient number of spaces in ,a radial direction vto determine the number of tens' in the product. 3o Thus it will be plain that the circumferential graduationsdenote the multiplier and that the-radial graduations denotethe product. 1 y

In Fig. 17 the 7' amount key and the 4 multiplier keyare shownin depressedv position. f The depression of the. 7 amount key has released the 7 stop plate and the initial stop plate of itsv associated bank 'and has also locked fremde ression all 4o otheramount keys in the same anla?4 Tlie depressionof the 4`-multiplierjkey has moved a stop projection ik into the path'of t he stud A, t iereby'linnting the downward .1',

rl`he. bar B of each bank is situated at the. left of the set of stop plates in a lower plane than the bar B and provided at theI forward end with a lateral projection or shelf-Ba which extends toward the right far enough to span their associated sets of stop plates. 'these bars Ill extend rearwardly and under the rear accumulator and each bar D* meshes with the accumulator pinion of next higher denomination to that with which its companion rack B meshes, and during forward stroke to register the tens of a product.

The units pinion oi" the rear accumulator has no tensI rack bar (B) but two alining teeth 1;* are cut in a bracket secured to the basev o the machine (scc Fig. 5), and said pinion engages and is locked by said teeth when out of engagement with the units rack bar B. The lrear accumulator is composed of ten accumulating -pinions, the tenth pinion being necessary to accumulate the tens' of products` of the ninth bank. tenth pinion there is provided arack bai' B5 (see Figs. 1,3 and 46) which is identical with the barsll excepting that it 'extends farther forward (this is tn ,avoid interference be.-

4 tween its lateral shelf B and the bracket B7) and its shelf is narrower. This rack bar is for the urpose of totalizing from saidtent-h .aecumu ator pinion and coactswith and is blocked by a special stop plate B"l which is" similar'toA-the mitialstopplates Au and-is released by the depression-of the total, sub- .total or product keys as later described. All of the rack bars are mounted'upon crossrods B" and Blf attherem: ot themachin'e and-upon cross .rods B" and ]3.which are secured in brackets B' and B and are held from lateral displacement by sleevessurrounding-said shafts.v v A .The rackbarsare spring drawn forward by s 'rings"1,' (Fig.r2), which are-inter oset between said .racks and a cross-plate movement ofsaid stop plates."'l`,heldepl'es"1"fj? seculed-tt'rtlie' brackets BT and B?, and

sion of the 47? multiplier liasalso'locked from dc iression all 'the'.fothe'rmultiplier keys.4 `'.l ie rn'ckvbars B andjB` areehown` seated against the;graduationsofjthe'- stag' b late A, it beingnoted that the' units bar.

50. has moved 4:[orwardl'eightapacea and the tens' bar Bl two apac'es,,makn;: the-product-l 'of seven multiplied by four, ria -t\4ventycighyt.'

Actuatirig rack barsftFigs. 1,'2, 3,5.and

The actuating-rack bara B' and IBt are arranged in pairs, onapair for each bank. The bar B of each4 baunk is situated at the right of the set of atopiplatw and provided nt its forward end withl a lateral irojeetion or hhelf. B,I which extends towarg `the .left (sce Figs. 1 and tl) -far enough lo a van its' asameiated act of atop plates. 'I` lese liars Il extend rearwardly and over the rear aeeumnlator and mesh therewith during wir 05 retu'rn stroke y i .flare'Testored by a square restoring bar B1.

.' .Snid'irestoring bar"exteu`ds.across the ma- .S' "chilnfe` inl the'z path 'of 'shoulders' on the rack ars :india-mounted between two reciprocat- Iing: baisBI and Bl', (1" igs. 3 and 5)`one.ou t eitl'ieriside'vof.thefmachine. Said bars B17 .j and"Bit-are"mounted'toslide on the shafts Bi? and B (see liigsl 1', 3,4, li'and (l). Pivoted at'rBfon'each,of the units-.rack bars B land theliar Bf. of the tenth pinion'of the' rear accumulator,are a series of downwardly 'and forwardly 'extending front arcmnnlator aetuatimrrawk.hars 'l-'l which at their forheld .from lateral dsphuwnrent. b v. sleeves aurrourulim: aaid crosarml.' y A number wheels D. and their companipi'i gear. 

